Modular pulmonary treatment system

A patient interface system for delivering a gas to a patient comprising:

• a patient interface device include a main body for placement against a face of the patient for delivering the gas thereto, the patient interface device including at least one inhalation valve and at least one exhalation valve;
• and
• a venturi device that is fluidly connected to the free second end of the conduit portion, the venturi device having at least one port for connection to a gas source, the venturi device having at least one primary air entrainment window and at least one secondary air entrainment window which is downstream of the at least one primary air entrainment window and thus closer to the main body of the patient interface device;
• wherein the at least one inhalation valve is disposed between:
• (1) the main body and (2) the primary and secondary air entrainment windows of the venturi device;
• wherein at least one of the primary air entrainment window and secondary air entrainment window includes a means for closing the respective window, thereby changing a degree at which the respective window is open and changing a flow rate of the air flowing through the respective window.

A patient interface system for delivering a gas to a patient comprising:

• a patient interface device for delivering a gas to a patient comprising:
• a main body for placement against a face of the patient, the main body including a conduit portion that is open at a first end to a hollow interior of the main body and a free second end for attachment to another object in a sealed manner;
• at least one exhalation valve assembly that is disposed within a first port formed in the main body and includes an exhalation valve member that is configured to vent exhaled air when open;
• a primary inhalation valve assembly that is disposed within the conduit portion and includes a primary valve member that moves between open and closed positions;
• and
• a secondary inhalation valve assembly that is disposed within a second port formed in the main body and includes a secondary valve member that moves between open and closed positions;
• and
• a first accessory that is fluidly attached to the conduit portion;
• wherein the primary inhalation valve assembly has a first flow resistance associated therewith and the second inhalation valve assembly has a second flow resistance associated therewith which is greater than the primary inhalation valve assembly and as a result, the secondary inhalation valve assembly acts as an emergency inhalation valve.